%%
%% The LaTeX Companion, 3ed
%%
%% Example 11-3-14 on page II-162 in "tikz-cd --- Commutative diagrams based on tikz".
%%
%% Copyright (C) 2022 Frank Mittelbach
%%
%% It may be distributed and/or modified under the conditions
%% of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%%
%% See https://www.latex-project.org/lppl.txt for details.
%%

\documentclass{tlc3examargin}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{147.0pt}

%StartShownPreambleCommands
\usepackage{tikz-cd}
\usetikzlibrary{decorations.pathmorphing}
%StopShownPreambleCommands

\begin{document}
\begin{equation}
  \begin{tikzcd}
  T \arrow[drr, dashrightarrow, bend left,
           "\textit{alternative}" description]
    \arrow[ddr, Mapsto, bend right, "y" blue]
    \arrow[dr, dotted, "{(x,y)}" description]  &  &   \\
    & X \times_Z Y \arrow[r, "p"] \arrow[d, blue, "q"']
      & X \arrow[d, rightsquigarrow, blue, "F" black] \\
    & Y \arrow[r, "a" near start, "c"', "b" near end] & Z
  \end{tikzcd}
\end{equation}
\end{document}
